This paper describes the fundamental principles of operation of a mixture injection system now called the Compression Wave Injection system (CWI). The system has been initially designed for use in ...

The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

Shock Diamonds and Mach Disks in jet engines exhaust can be particularly evident and fascinating at night. The video below shows RAF Lakenheath’s Propulsion Test Cell during a test of an F-15E Strike ...

A new MIT study has examined the possibility of acoustic-gravity waves – high-speed sound waves often generated by underwater earthquakes and landslides – acting as an early warning of tsunamis and ...